On 5/25/2021 11:23 AM, Takashi Iwai wrote: >>> Let's check other possibilities >>> at first, e.g. setting auto_mute_via_amp flag. This can be achieved >>> even via hints in an early patching specified via "patch" option of >>> snd-hda-intel module (see Documentation/sound/hda/notes.rst for some >>> information). >> >> Unfortunately the auto_mute_via_amp has no effect on the pop. >> line_in_auto_switch and pin_amp_workaround have no effect either. > > How about applying alc_fixup_no_shutup() or alc_fixup_disable_aamix()? it looks like SND_PCI_QUIRK(0x17aa, 0x1048, "Lenovo ThinkStation P340", ALC269_FIXUP_NO_SHUTUP), in alc269_fixup_tbl[] alone fixes the pop noise, I'll send a new patch to do this instead. Thanks, Péter
